Issued Patents All Time
Showing 1–25 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11598895 | Ultrasonic waveform processing using deconvolution in downhole environments | Glenn Andrew Wilson | 2023-03-07 |
| 10712466 | Casing thickness measurement using acoustic wave correlation | Tianrun Chen, Yibing Zheng, Tatiana Gilstrap, Robert Eric Epstein | 2020-07-14 |
| 10386522 | Method and apparatus for the downhole in-situ determination of the speed of sound in a formation fluid | Li Gao, Michael T. Pelletier, Thurairajasingam Rajasingam, Paul Andrew Cooper | 2019-08-20 |
| 10352908 | Method and apparatus for the downhole in-situ determination of the speed of sound in a formation fluid | Li Gao, Michael T. Pelletier, Thurairajasingam Rajasingam, Paul Andrew Cooper | 2019-07-16 |
| 10317555 | Method of minimizing tool response for downhole logging operations | Wei Li, Ruijia Wang, Glenn Andrew Wilson, Chung Chang | 2019-06-11 |
| 10301932 | Ultrasonic casing and cement evaluation method using a ray tracing model | Tianrun Chen, Yibing Zheng, Tatiana Gilstrap, Robert Eric Epstein, Zhijuan Zhang | 2019-05-28 |
| 10294772 | Circumferential array borehole evaluation tool | Jim Taylor Hill, Philip Edmund Fox, Philip William Tracadas | 2019-05-21 |
| 10267941 | Estimate of formation mobility from Stoneley waveforms | Mark Vincent Collins | 2019-04-23 |
| 9891336 | Acoustic isolator for downhole tools | Chung Chang, Abbas Arian, Gary Kainer, Paul G. Junghans, Randall B. Jones | 2018-02-13 |
| 9784876 | Characterizing a downhole environment using stiffness coefficients | John Andrew Quirein, Mahmoud Eid Selim | 2017-10-10 |
| 9757770 | Asymmetric bender bar transducer | Chung Chang, Chen Li, Jing Jin | 2017-09-12 |
| 9753170 | Sourceless density determination apparatus, methods, and systems | Batakrishna Mandal, Nigel Mark Clegg, Jennifer Market | 2017-09-05 |
| 9705239 | Flexible electrode assembly and apparatus for measuring electrophysiological signals | Alexander Klistorner, Stuart Lindsay Graham | 2017-07-11 |
| 9631483 | Joint time-frequency processing for borehole acoustic arrays | Burkay Donderici | 2017-04-25 |
| 9631476 | Variable stiffness downhole tool housing | Chung Chang, Gary Kainer | 2017-04-25 |
| 9606254 | Determining cement impedance from a formation boundary | Mark Elliott Willis, Tatiana Gilstrap, Robert Eric Epstein | 2017-03-28 |
| 9529105 | Acoustic logging systems and methods employing multi-mode inversion for anisotropy and shear slowness | Mark Vincent Collins | 2016-12-27 |
| 9519073 | Differential phase semblance apparatus, systems, and methods | Pradip Kumar Mukhopadhyay | 2016-12-13 |
| 9513396 | Formation property determination apparatus, methods, and systems | Mark Vincent Collins | 2016-12-06 |
| 9470810 | Data double-searching apparatus, methods, and systems | Donghong Pei, Janusz Peron | 2016-10-18 |
| 9348052 | Analytic estimation apparatus, methods, and systems | Mark Vincent Collins | 2016-05-24 |
| 9322947 | Acoustic receiver assembly for downhole tools | Chung Chang, Abbas Arian, Randall B. Jones, Gary Kainer | 2016-04-26 |
| 9322807 | Ultrasonic signal time-frequency decomposition for borehole evaluation or pipeline inspection | Yinghui Lu, Zhijuan Zhang, Tatiana Gilstrap, Rob Epstein | 2016-04-26 |
| 9158014 | Acoustic source apparatus, systems, and methods | Clovis Bonavides, Batakrishna Mandal, Wei Zhang, Philip William Tracadas, Gary Kainer +2 more | 2015-10-13 |
| 9110166 | Acoustic imaging | Chung Chang, Chen Li, Steve Zannoni | 2015-08-18 |